Configuring Bidirectional Forwarding Detection

The bidirectional forwarding detection (BFD) protocol is a simple hello mechanism that detects failures in a network. BFD works with a wide variety of network environments and topologies. The failure detection timers for BFD have shorter time limits than the failure detection mechanisms of IS-IS, providing faster detection. These timers are also adaptive and can be adjusted to be more or less aggressive.

To enable failure detection, include the bfd-liveness-detection statement:

[edit routing-options static (defaults | route)]

bfd-liveness-statement {

    minimum-interval milliseconds;

    minimum-receive-interval milliseconds;

    minimum-transmit-interval milliseconds;

    multiplier number;

}

To specify the minimum transmit and receive interval for failure detection, include the minimum-interval statement:

[edit routing-options static (defaults | route) bfd-liveness-statement]

minimum-interval milliseconds; 

To specify the minimum receive interval for failure detection, include the minimum-receive-interval statement:

[edit routing-options static (defaults | route) bfd-liveness-statement]

minimum-receive-interval milliseconds; 

To specify the minimum transmit interval for failure detection, include the minimum-transmit-interval statement:

[edit routing-options static (defaults | route) bfd-liveness-statement]

minimum-transmit-interval milliseconds; 

To specify the detection time multiplier for failure detection, include the multiplier statement:

[edit routing-options static (defaults | route) bfd-liveness-statement]

multiplier number; 

For a list of hierarchy levels at which you can configure these statements, see the statement summary sections for these statements.

NOTE: If BFD is configured only on one end of a static route, the route is removed from the routing table. BFD establishes a session when BFD is configured on both ends of the static route.

To enable failure detection for IPv6 routes, include the bfd-liveness-detection statement:

[edit routing-options rib inet6.0 static (defaults | route)] 

bfd-liveness-detection {

    minimum-interval milliseconds;

    minimum-receive-interval milliseconds;

    minimum-transmit-interval milliseconds;

    multiplier number;

}

For a list of hierarchy levels at which you can configure these statements, see the statement summary sections for these statements.